<input  type="text" name="dd" id="dd"  autoComplete='off'/>
<script src="jquery-3.5.1.min.js"></script>
<script  id="jquery_183" type="text/javascript" class="library" language="text/javascript">
    $(function(){

        $('#dd').bind('input onchange', function() {

            jQuery.ajax({
                type: "POST",
                url: 'upl.php',
                data: {functionname: 'up', arguments: [$(this).val()]},
                success:function(data) {
                    if(data!='')
                    alert(data);
                }
            });
        });

    })
</script>